Bushing for centrifugal pumps.



' No. 693,247. Patented Feb. I902. J. EDWARDS.

BUSHING FUR CENTBIFUGAL PUMPS. (Application filed June 13, 1898. Renewed Nov. 26, 190 1.)

(N6 Modal.)

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UNITED STATES PATENT OFFICE.

JOSEPH EDWARDS, OF BROOKLYN, NEW YORK.

BUSHING FOR CENTRIFUGAL PUMPS.

SPECIFICATION forming part of Letters Patent No. 693,247, dated February 11, 1902.

Application filed June 13, 1898. Renewed November 26,1901. Serial No. 83,777. (No model.)

To all whom it may concern:

, Be it known that I, JosnPH EDWARDS, a citizen of the United States, residing in the borough of Brooklyn, in the city and State of New York, have invented new and useful Improvements in Bushings for Centrifugal Dredging-Pumps, of which the following is a specification.

This invention relates to devices for preventing injury to stationary and moving elements of driving apparatus, and particularly to means for preventing injury to shafts, spindles, and similar parts of pumps or like apparatus; and some of the objects of the invention are to provide renewable means for preventing the wear of spindles and shafts of machinery.

Another object is to produce such means constructed to be easily and quickly secured in position without the necessity of conveying the shaft or spindle to a machine shop or forge.

A further object of the invention is to provide means of the foregoing general character which can be cheaply constructed and which when injured can be melted, recast, and used again.

With these and other objects in view the invention consists, essentially, in the construction, combination, and arrangement of parts, substantially as hereinafter more fully described in the following specification and illustrated in the accompanying drawings, forming part of this application, in which- Figure 1 illustrates a longitudinal sectional view of a portion of a pump-head bearing and hub of the piston, the blades and shaft being shown in elevation; and Figs. 2 and 3 are perspective detailed views of parts of the apparatus.

Similar characters of reference designate corresponding parts throughout the several views.

Referring to the drawings, the reference character 1 designates a movable element, such as a shaft or spindle, of any preferred construction, which may form part of any driving apparatus or mechanism to which this invention may be applied, as it is understood that the same is not confined to centrifugal dredging-pumps, but is described and illustratedin connection therewith merely as one type of apparatus to whichit maybe applied. 1 The reference character 6 refers to a sleeve of any preferred construction and material, preferably steel, adapted to be shrunk upon the shaft in a position thereon to receive the wear occasioned by the revolution of the shaft in its bearings, and the sleeve 6 may be so shrunk upon the shaft by first heating it thereon.

It will be fully appreciated that shafts or spindles are often very valuable and are fre quenily rendered unfit for use after but little service, owing to the wear at certain point or points to which the same are subjected, and when so worn, if only slightly, the shafts are no longer useful and must be replaced by new ones at a great expenditure of time and money. It is therefore the object of the sleeve 6 to overcome the objections before stated and prevent injury to the shaft, for when the sleeve becomes worn and injured the same may be removed from the shaft anda new-one placed in position thereon.

In the drawings the reference character 2 designates blades or wings to show their connection with the movable element or shaft 1, which are preferably keyed or otherwise rigidly connected with one end of the shaft 1, so as to move therewith,as hereinafter explained.

Upon the shaft 1 and over the sleeve 6 is mounted a removable bushing 7, desirably having an annular flange 8, preferably cut away, as shown at 9, to form a clutch to engage with the projections or extensions cl upon a hub 3, formed on or connected with the stationary element, such as the head of the pump 4, so that the bushing 7 is prevented from rotation with the shaft 1 and sleeve 6; but said sleeve rotates within said bushing, as will be readily understood. The bushing 7 may be melted and recast when worn or injured, and by having a crucible and mold along with thepump injury tothe bushing can be repaired at' the place the pump is working with but slight expense of money and time. By means of this construction the wear caused by the rotation of the shaft is caused to act upon the sleeve 6, as before explained, and the bushing 7, and as both of these parts are renewable and can be easily removed and replaced, and that at a very small expense of time and money, the great value and practicality of the invention will be at once apparent.

The operation of this invention will be readily understood from the foregoing description when taken in connection with the accompanying drawings and the following explanation thereof: A suitable sleeve 6 is first shrunk upon a shaft 1, and a bushing 7, of any preferred construction, is slipped upon the shaft over said sleeve and the Whole introduced into the hub 5 of the pump-head 4 or similar construction, the bushing and hub of the pump-head preferably being detachably connected, so as to be held against rotation in respect to each other, whereupon the wings may be connected with the end of the shaft 1 in any suitable manner, as will be readily understood.

By means of the foregoing construction the objects hereinbefore mentioned are easily, speedily, and cheaply attained and the ordinary delay and expense heretofore incident to the Wearing of the shaft, necessitating its removal from the apparatus and the introduction of the new shaft, have been avoided.

I do not desire to confine myself to the specific construction, combination, and arrangement of parts herein shown and described, and I reserve the right to make all such changes in and modifications of the same as fairly come within the scope and spirit of my invention.

Having accuratelydescribed myinvention, what I claim as new, and desire to secure by Letters Patent, is

1. A stationary element provided witha rcmovable bushing prevented against rotation therein, a movable element and a rigid sleeve upon the latter constructed to rotate Within said bushing to confine the Wear to said sleeve and bushing and prolong the serviceability of said elements.

2. A stationary element, a bushing having clutch engagement therewith to prevent the rotation of the latter within the former, a movable element and a sleeve rotating with said movable element within said bushing whereby said sleeve and bushing will prevent injury to said elements by receiving all of the wear.

JOSEPH EDWVARDS.

Witnesses:

MAYBURY W. BIRCH, HENRY J. SAVAGE. 

